If the USB port on the keyboard isn't working with your PC, check if the keyboard has standard 5-pin MIDI ports (Round holes labeled "In" and "Out"). If it does, ignore the keyboard's USB port and buy a USB-to-MIDI Interface Cable
The original drivers often fail on modern 64-bit systems. Users on the Steinberg Forums recommend using generic USB-MIDI drivers, such as the Tobias Erichsen USB-MIDI Driver, which provides better compatibility for current DAWs. How to Connect the PM 747 to Your PC Bontempi 747 Keyboard - Cubase - Steinberg Forums Bontempi Keyboard Pm 747 Driver Download UPD
